neutron agent-list got nothing

I'm following documentation for juno multinode (3 node) setup. In the chapter "6. Add a networking component" in section "Install and configure network node". Everything is all right. And I did carefully.
When I want to List agents to verify successful launch of the neutron agents, I got nothing, empty!!!!i
I've done everything before executing these two codes.

source admin-openrc.sh
neutron agent-list

Please tell me if you need me to provide any information to solve this.
Thank you!

Comments

You mean on my controller node? or network node.
In /var/logs/neutron/ folder of network node, I find dhcp-agent.log metadata-agent.log ovs-cleanup.log
l3-agent.log openvswitch-agent.log.
In /var/logs/neutron/ folder of controller node, I find server.log.
which one is needed?
Thank you !

from the logs provided found two issues
1. the network node cannot connect to rabbitmq on controller node
2. the l3-agent seemed has no driver specified or incorrectly set.
could you paste the configuration file for neutron-ovs-agent and l3-agent.ini in the network node?